I'm not sure, but they did definitively say that in terms of drop chance generic legendaries count as legendaries for all specs. In that when you have 0 or 1 legendary, there is a much higher drop chance, so say on a druid you have 2 spec specific resto, balance and feral legendaries, Guardian would have the higher drop chance as though you have none, but if you have a Prydaz and Sephuz and nothing else, all your specs count as 2 legendary and go to the much lower chance of 3+ legendary drop chance. Not sure how this applies to bad luck though, it is all very confusing, and not sure why they would go out of their way to describe the situation with generic legendaries in detail when according to them anything past 2 has the same drop chance anyway.
For me, I'm also trying for bracers (for resto), but I have no generic legendaries, so my Resto has the 0 legendary drop chance, and I'm trying to keep it that way by avoiding generic legendaries, and only opening Wrist items in Resto spec. Not building as much bad luck protection, but I have the 0 legendary chance. Hard to tell if that is the better or worse option, though unless I get a generic on another spec, it guarantees my first will be the one I want.